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题名: One-pot synthesis of 3D hierarchical porous Li3V2(PO4)(3)/C nanocomposites for high-rate and long-life lithium ion batteries
作者: Cheng, Yi1, 2;  Zhou, Wei1, 2;  Feng, Kai1, 3;  Zhang, Hongzhang1;  Li, Xianfeng1, 3;  Zhang, Huamin1, 3
刊名: RSC ADVANCES
发表日期: 2017
DOI: 10.1039/c7ra06706b
卷: 7, 期:61, 页:38415-38423
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Li3V2(PO4)(3) (abbreviated as LVP) is considered as a prospective cathode material for next-generation Li ion batteries due to its high specific capacity and high operating potential. However, its low electronic conductivity and the difficulty in morphology control restrict its widespread application. Carbon coating has been proved to be an effective method for solving these problems. However, too thick a carbon layer will act as a barrier for Li+ diffusion. 3D hierarchical porous materials with unique electronic and structural properties have exhibited outstanding advantages. However, most methods employed for fabricating the hierarchical porous materials need templates and need acid or alkali to remove the template afterwards. This is detrimental to the LVP material because the LVP reacts with both acid and alkali. Here we present a rational design for a hierarchical porous LVP/C nanocomposite via a one-pot process, in which F127 molecules and the LVP colloids induce self-assembly. After high-temperature annealing, the mesoporous structure was developed due to the decomposition of the F127 and then the LVP/C clusters piled up to form stacked macropores. As a cathode for Li ion batteries, the LVP/C nanocomposite exhibited excellent cycle stability (96% capacity retention over 800 cycles) and enhanced high-rate performance (117 mA h g(-1) at 20C). This method provides a new approach for synthesizing high-performance 3D hierarchical porous cathode materials used in other energy storage applications.
关键词[WOS]: HIGH-RATE CAPABILITY ;  CATHODE MATERIAL ;  ELECTROCHEMICAL PERFORMANCE ;  HIGH-CAPACITY ;  CARBON ;  STORAGE ;  FABRICATION ;  COMPOSITES ;  NANOWIRES ;  OXIDE
语种: 英语
WOS记录号: WOS:000407442000036
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149942
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Collaborat Innovat Ctr Chem Energy Mat, Dalian 116023, Peoples R China

Recommended Citation:
Cheng, Yi,Zhou, Wei,Feng, Kai,et al. One-pot synthesis of 3D hierarchical porous Li3V2(PO4)(3)/C nanocomposites for high-rate and long-life lithium ion batteries[J]. RSC ADVANCES,2017,7(61):38415-38423.
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